diff --git a/apps/web/src/features/purchases/components/LicensesView.tsx b/apps/web/src/features/purchases/components/LicensesView.tsx
index 838994948..fcfc60524 100644
--- a/apps/web/src/features/purchases/components/LicensesView.tsx
+++ b/apps/web/src/features/purchases/components/LicensesView.tsx
@@ -1,11 +1,12 @@
 /**
  * LicensesView — list of user's purchased licenses with download links (v0.401 M2)
+ * v0.403 F1: Invoice download link
  */
 import { useState, useEffect } from 'react';
 import { marketplaceService } from '@/services/marketplaceService';
 import { Button } from '@/components/ui/button';
 import { Card } from '@/components/ui/card';
-import { Download, FileAudio } from 'lucide-react';
+import { Download, FileAudio, FileText } from 'lucide-react';
 import { EmptyState } from '@/components/ui/empty-state';
 import { Skeleton } from '@/components/ui/skeleton';
 
@@ -72,16 +73,32 @@ export function LicensesView() {
                 Purchased {item.order?.created_at ? new Date(item.order.created_at).toLocaleDateString() : '—'}
               </div>
             </div>
-            <Button
-              variant="outline"
-              size="sm"
-              disabled={!item.download_url}
-              onClick={() => item.download_url && window.open(item.download_url, '_blank')}
-              className="shrink-0"
-            >
-              <Download className="w-4 h-4 mr-2" />
-              Download
-            </Button>
+            <div className="flex gap-2 shrink-0">
+              <Button
+                variant="outline"
+                size="sm"
+                disabled={!item.download_url}
+                onClick={() => item.download_url && window.open(item.download_url, '_blank')}
+              >
+                <Download className="w-4 h-4 mr-2" />
+                Download
+              </Button>
+              <Button
+                variant="outline"
+                size="sm"
+                onClick={async () => {
+                  try {
+                    const orderId = item.order?.id ?? item.license?.order_id;
+                    if (orderId) await marketplaceService.downloadInvoice(orderId);
+                  } catch {
+                    // ignore
+                  }
+                }}
+                title="Download Invoice"
+              >
+                <FileText className="w-4 h-4" />
+              </Button>
+            </div>
           </Card>
         ))}
       </div>
diff --git a/apps/web/src/features/purchases/pages/purchases-page/PurchasesView.tsx b/apps/web/src/features/purchases/pages/purchases-page/PurchasesView.tsx
index 7bb45f4a8..61ed6561d 100644
--- a/apps/web/src/features/purchases/pages/purchases-page/PurchasesView.tsx
+++ b/apps/web/src/features/purchases/pages/purchases-page/PurchasesView.tsx
@@ -1,5 +1,6 @@
 import { RefundRequestModal } from '@/components/commerce/modals/RefundRequestModal';
 import toast from '@/utils/toast';
+import { marketplaceService } from '@/services/marketplaceService';
 import { usePurchasesView } from './usePurchasesView';
 import { PurchasesViewHeader } from './PurchasesViewHeader';
 import { PurchasesViewList } from './PurchasesViewList';
@@ -19,6 +20,15 @@ export function PurchasesView({ initialPurchases }: PurchasesViewProps = {}) {
     handleDownload,
   } = usePurchasesView(initialPurchases ?? undefined);
 
+  const handleInvoiceDownload = async (orderId: string) => {
+    try {
+      await marketplaceService.downloadInvoice(orderId);
+      toast.success('Invoice downloaded');
+    } catch {
+      toast.error('Failed to download invoice');
+    }
+  };
+
   if (loading) {
     return <PurchasesViewSkeleton />;
   }
@@ -34,6 +44,7 @@ export function PurchasesView({ initialPurchases }: PurchasesViewProps = {}) {
         setActiveDownloadId={setActiveDownloadId}
         onDownloadFormat={handleDownload}
         onLicense={() => toast('License document opened')}
+        onInvoiceDownload={handleInvoiceDownload}
         onRefund={setRefundOrderId}
       />
 
diff --git a/apps/web/src/features/purchases/pages/purchases-page/PurchasesViewItem.tsx b/apps/web/src/features/purchases/pages/purchases-page/PurchasesViewItem.tsx
index 5ca49c3c9..d4624f4de 100644
--- a/apps/web/src/features/purchases/pages/purchases-page/PurchasesViewItem.tsx
+++ b/apps/web/src/features/purchases/pages/purchases-page/PurchasesViewItem.tsx
@@ -9,6 +9,7 @@ interface PurchasesViewItemProps {
   onToggleDownload: () => void;
   onDownloadFormat: (format: string) => void;
   onLicense: () => void;
+  onInvoiceDownload: (orderId: string) => void;
   onRefund: () => void;
 }
 
@@ -20,6 +21,7 @@ export function PurchasesViewItem({
   onToggleDownload,
   onDownloadFormat,
   onLicense,
+  onInvoiceDownload,
   onRefund,
 }: PurchasesViewItemProps) {
   const product = purchase.product as { title: string; coverUrl?: string; type?: string };
@@ -86,6 +88,17 @@ export function PurchasesViewItem({
           License
         </Button>
 
+        <Button
+          variant="ghost"
+          size="sm"
+          className="border border-border"
+          icon={<FileText className="w-4 h-4" />}
+          onClick={() => onInvoiceDownload(purchase.orderId)}
+          title="Download Invoice"
+        >
+          Invoice
+        </Button>
+
         <Button
           variant="ghost"
           size="sm"
diff --git a/apps/web/src/features/purchases/pages/purchases-page/PurchasesViewList.tsx b/apps/web/src/features/purchases/pages/purchases-page/PurchasesViewList.tsx
index 3568ee536..6dbbc809a 100644
--- a/apps/web/src/features/purchases/pages/purchases-page/PurchasesViewList.tsx
+++ b/apps/web/src/features/purchases/pages/purchases-page/PurchasesViewList.tsx
@@ -23,6 +23,7 @@ interface PurchasesViewListProps {
   setActiveDownloadId: (id: string | null) => void;
   onDownloadFormat: (format: string) => void;
   onLicense: () => void;
+  onInvoiceDownload: (orderId: string) => void;
   onRefund: (orderId: string) => void;
 }
 
@@ -33,6 +34,7 @@ export function PurchasesViewList({
   setActiveDownloadId,
   onDownloadFormat,
   onLicense,
+  onInvoiceDownload,
   onRefund,
 }: PurchasesViewListProps) {
   if (loading) return null;
@@ -64,6 +66,7 @@ export function PurchasesViewList({
             }
             onDownloadFormat={onDownloadFormat}
             onLicense={onLicense}
+            onInvoiceDownload={onInvoiceDownload}
             onRefund={() => onRefund(purchase.orderId)}
           />
         </motion.div>
diff --git a/apps/web/src/services/marketplaceService.ts b/apps/web/src/services/marketplaceService.ts
index 8db8d0ee2..4231a8cfa 100644
--- a/apps/web/src/services/marketplaceService.ts
+++ b/apps/web/src/services/marketplaceService.ts
@@ -149,6 +149,22 @@ export const marketplaceService = {
     return response.data;
   },
 
+  // v0.403 F1: Download invoice PDF
+  downloadInvoice: async (orderId: string) => {
+    const response = await apiClient.get(`/marketplace/orders/${orderId}/invoice`, {
+      responseType: 'blob',
+    });
+    const blob = new Blob([response.data], { type: 'application/pdf' });
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement('a');
+    a.href = url;
+    a.download = `invoice-${orderId.slice(0, 8)}.pdf`;
+    document.body.appendChild(a);
+    a.click();
+    document.body.removeChild(a);
+    URL.revokeObjectURL(url);
+  },
+
   // Wishlist (requires auth)
   getWishlist: async (): Promise<Product[]> => {
     const response = await apiClient.get<{